The remains of the world’s oldest planned city may crumble to dust in twenty years if action isn’t taken, the Telegraph reports.

Mohenjodaro, a 5,000 year-old city in Pakistan, is under threat from extreme temperatures and monsoon rains, which leave deposits of salt on the unbaked clay bricks that were used to create its buildings. That salt leeches out any moisture in the bricks and slowly turns them to dust.

A crew of workmen is coating the ancient structures with salt-free mud, but there are far too few people on the job and very little money.

The Bronze Age city, which is a UNESCO World Heritage Site, was founded around 3,000 BC and shows a remarkable amount of urban planning. There were toilets in every house, separate water systems for drinking and sewage, roads laid out on a grid system, a large communal bath shown in the above photo, and a communal granary. It was the center of the Indus Valley civilization and traded as far away as Mesopotamia, using a set of standardized weights and measures to regulate commerce.

UNESCO officials met with Pakistani archaeologists last week to draw up a plan to save the site, which includes burying some of the most threatened structures. It remains to be seen whether Pakistan’s government, strapped for cash and stuck in a grueling war with the Taliban, will foot the bill.

I visited Mohenjodaro back in 1994 when Pakistan was safer to visit than it is now and found the place to be enchanting. The layout can be clearly seen and it almost feels like you’re in a living city. It would be a shame if such a landmark of human development disappeared.